Hoop-flaring machine



(No Model.)

M. H. RITZWOLLER. HOOP FLARING' MAGHINE.

Patented July 9, 1895.

WITNESSES:

' INVENTOI? JQwJUf z'igwolkr A 7TORNEYS.

UNITED STATES PATENT DFFIcE.

MAX H. RrrZWoLLER, OFFPEORIAJLLINOIS.

HOOP-FLARING MACHINE.

SPECIFICATION forming part of Letters Patent No. 542,572, dated July 9, 1895. Application filed May 1.1895. semi No. 547,795. (No model.)

To (0% whom, it may concern.-

Be it known that I, MAX H. RITZWOLLER, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Hoop-Flair ing Machines, of which the following is a.

specification. A I

My invention relates to improvementsin machines employed for flaring and bending iron and steel hoops, and it refers more particularly to that kind of machine having three short shafts extended to the exterior of the frame, on each of which are mounted two heads having a perfectly straight face, be: tween which are placed washers about the, thickness of a hoop, all of which is held to: gether rigid by one solid nut, such a con struction of machine being one now most gen-' erally used for bending hoops.

From practical experience with a machine as described it has been found that at times the work accomplished is very faultythat is,

it will unevenly flare the hoop and cause some work to kink and stick in the heads, it also being impossible to flare hoops of different gages.

My invention primarily has for its object to provide such an improved arrangement of pointed out in the appended claims, referencebeing had to the accompanying drawings, in which- Figure 1 is aperspective View of a hoopbending machine with my improvements applied. Fig. 2 is a View illustrating one of the shafts equipped with my improved devices; and Fig. 3 is a view in perspective illustrating a portion of one of the shafts, the

. fixed and movable heads, and the washers detached.

Referring to the accompanying drawings,

A'indicatcs the'base of body of the machine; B, the band-wheel;-0, the main power-shaft;

E and F, the supplemental shafts, and G the drive-gearing, all of which, except the shafts,

areof the ordinary construction of machines now in general use.

In the construction of such machines the hoop clam ping heads are made with perfectly straight faces, and on the shafts between such faces are disposed thin washers of about "the thickness of a hoop, which heads and washers are held in contact by nuts on the shafts in a manner well understood. The

principal objection to this construction is that in case the securing-nuts should work loose the hoop-iron will slip down between thewashers, or between one washer and face :of the clamp-head, thereby kinking the hoop and causing it to stick in its passage through the machine.

V In the construction of my improved machine I form the bearing-faces of the clampheads with circular sockets, into which is fitted a single washer of athickness sufficient to keep the heads spaced apart the desired distance to admit the hoop. This construction prevents the hoop from working between the washer and the bearing-faces of the clampheads.

By referring particularly to Fig. 2 it will be seen that a clamp-head H is fixedly secured to the shaft 0, such head having a circular socket it formed in its bearing-face. A movable clamp-head H is also mounted on the shaft and is provided with a similar socket h into which sockets are adapted to project the opposite faces of a washer I, such Washer being of a thickness considerably greater than that of the ordinary hoop which is to be flared. This movable head H is held up against the washer I by a powerful coilspring J, held on the shaft, saidlshaft being of a length sufficient to accommodate the spring J and an adjustable collar K, adapted to hold the spring under the proper tension. By this construction it will be noticed that when the hoops to be flared are of different slightly depressed, thereby stretching the fibers of the lower edge of such portion, which has the effect of giving the hoop the desired flare.

From the foregoing, taken in connection with the drawings, it will be readily apparent that as the heads H and H at all times project over the edges of the washer l'it will be impossible for the hoop to pass down between the washer and such heads and become kinked. Furthermore, as the outer head is yielding it follows that hoops of different gages can be flared uniformly and freely. Having thus described my invention,what

1. In a machine as described, the combination with the feed shafts, having each a fixed head member formed with a circular socket in its clamp face, an opposing yielding clamp head having a similar socket and a Washer held between the said heads having its opposite faces filling the sockets in the said heads as set forth.

2. As an improvement in hoop bending and flaring machines, a feed shaft having a fixed clamp head provided with a circular socket in its bearing face, a second clamp head loosely fitted on the said shaft, havinga corresponding socket, a washer held between the saidheads and having its opposite faces adapted to seat in the aforesaid sockets, the spring J and the adjustable collar K allarranged substantially as shown and for the purposes described.

' MAX H. RITZWOLLER.

Witnesses:

JAM s W. HUNT, LoUIs S. OWENHEIM. 

